Beater-arm mechanism for looms



May 4 1926. 1,582,995

J. LUCAS BEATER ARM MECHANISM FOR LOOMS Filed May- Jam r/m/v L 11045 v Arm/mm claim.

Patented May 4, 1926.

UNITED STATES PATENT OFFICE.

JONATHAN LUCAS, 0F SAVANNAH, GEORGIA, ASSIGNOR TO LUGAS -LAMBORN LOOM CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

IBEATER-AR-M MECHANISM FOR LOOMS.

AppIication fi ed May 29, 1925. Serial No. 33,591.

To all "whom it may concern:

Be it known that I, JONATHAN LUCAS, a citizen of the United States, and resident of Savannah, county of Chatham, and State of Georgia, have invented certain new and useful Improvements in Beater-Arm Mechanism for Looms, of which the following is a specification.

My invention relates to looms and has for its object to provide a beater arm mechanism of novel construction whereby the beater arm is operated in an eiiicient and simplified manner and so as to reduce wear and tear upon the parts and the noise of operation to a minimum. The invention further contemplates the provision of a novel feature capable of being utilized in other mechanisms which involve a rotatable driving member and a member oscillated thereby and including a curved groove whereby the connection with the rotatable member is brought about. The invention will be fully described hereinafter and the features of novelty will be pointed out in the In the accompanying drawings, which illustrate an example of the invention without defining its limits, Fig. 1 is a diagram-- matic, sectional elevation of a loom with my invention incorporated therein; Fig. 2 is a fragmentary view showing the mechanism in .a different position, and Fig. 3 is a perspective view of a block forming part of the invention.

v As shown in the drawings the loom comprises a support or frame 10 of customary or special construction and in its complete form including suitable mechanism for passing the shuttle through the shed for instance upon guides 11 fixed upon the support 10. The usual warp threads 12 pass from a roll 13 rotatably' mounted upon the frame 10, over the whip roll 14 and through the harness 15 which is operated in any conventional manner to form the shed 16 through which the shuttle is passed to weave the fabric 17. The woven fabric 17 passes over suitable rollers 18 and 19 and is progressively wound upon the roller 20.

The beater arm mechanism comprises complemental levers 21 pivoted at 22 at 0pposite sides of the loom in registry with each other and continued in the form of forwardly projecting arms 23 between which the reed 24 extends and whereby said reed is carried. At the proper point the lovers '21 are provided 'withcurved grooves 25 comprising arcs of circles and in which camblocks 26 are slidably fitted, the walls of said blocks which engage the'walls of the grooves conforming to the shape of the latter as shown in the drawings. Crank pins 27 are connected with the blocks 26 so as to'be capable of rotating therein and'themselves are connected with a cranlcdisc 28 carried by a shaft 29 which is journalled in suitable bearings upon the frame 10. The crankdisc 28 is operated by means of a bevel pinion 30 mounted upon the shaft 29 and meshingwith a similar pinion 31 fixed upon an upright shaft 32 also journalled in suitable bearings upon the frame 10.- The upright shaft 32 carries a bevel-gear 33 which meshes with a bevel-gear 34 fixed upon a shaft 35 iournalled in suitable bearings on the frame 10 and driven in any convenient manner and exemplifying the driving mechanism for operating the beater arm mechanism; the said shaft 85 may also carry the mechanism whereby the shuttle iscaused to travel through the shed 16.

The grooves 25 are curved in arcs which in radius correspond to the radius of the circular path described by the crank-pins 26 in the operation of the machine, the arrangement being such that at agiven point in the operation of the lever the grooves 25 will be in concentric registry with said path. Inthe preferredconstruction a bumper 86 of rubber or "its equivalent is fixed at one end of each groove 25 as shown in Figs. 1 and 2 for the purpose to be more fully described hereinafter.

In describing the operation of the machine it will be assumed that, at the start, the parts are in the position shown in Fig. 2 which represents the start of the forward movement of the reed 24 to pack the filling threads. As the machine operates the crank-disc 28 is rotated in. the direction indicated by the arrow (0 in'the drawings which causes the blocks 26 to engage and exert a push upon the bumpers 36 and to thereby assist the starting force of the cam blocks 26 exerted upon the walls of the grooves 25. As the rotation of the crank-disc 28 continues, the action of the blocks 26 upon the walls of the grooves 25 will swing the levers 21 forwardly until finally the position shown in Fig. 1 is reached, at which time the reed 24 which has partaken of the aforesaid movement of said levers has performed its function of packing the filler threads. Continued operation of the crank-disc 28 Wlll shift the blocks 26 further along in the grooves 25 from the point occupied by said blocks in Fig. 1 toward the ends Z) of said grooves, and will cause said cam-blocks to act in a reverse direction upon the walls of said grooves 25 and consequently swing the levers 21 and with them the arms 23 and reed 24 back to the position illustrated in Fig. 2. As the parts return to this position the cam-blocks 26 are located near the ends 5 of the grooves 25 and the latter are in concentric registry with the circular path of the crank-pins 27, in the manner indicated in Fig. 2. Because of this fact continued operation of the crank-discs 28 will slidably shift the cam-blocks 26 from points near the ends 6 of the grooves 25 back to the bumper 36 without however causing any pivotal movement of the levers 21 and their associated parts. In other words the beater mechanism is permi ted to dwell or rest, in its rearmost position for a sufiicient period of time to permit the required other mechanical functions of the loom to be performed. The operative arcs during which the forward and return movements and the dwell of the beater respectively take place are in dicated by the arcuate arrows 0, (Z and 6 respectively.

During the described operation of the parts the cam-blocks 26 accommodate themselves, by movements about the crank-pins 27, to the changes in the position of the grooves 25 and provide an increasing forward push to the beater arm at the point of ivergence of the two arcs represented respectively by one of the grooves 25 and the circular path of the co-operating crank-pin 25. The provision of the cam-blocks 26 and the grooves 25 in combination with the crank-pins 27 thus comprise a novel connection between the beater arm mechanism and the means whereby the same is operated and which does away with a major portion of the wear and tear upon the parts present in existing arrangements and at the same time reduces the operative noises to a minimum.

The provision of the cam-blocks 26- also does away with any tendency of the parts to bind in the grooves 25 as would be the case if rollers were substituted for the blocks; the co-action between the walls of the blocks and the walls of the grooves is always such that a smoothness of operation compare.- tively free from frictional disturbances is secured. While the novel features above mentioned are specially adapted for use in connection with the novel beater mechanism herein shown and described, it will be obvious that said features are capable of being used in other mechanisms whichv include a rotatably operated crank-disc and a member pivotally oscillated thereby.

Various changes in the specific form shown and described may be made within the scope of the claim without departing from the spirit of my invention.

I claim:

In a loom the combination of a craulc disk, a crank-pin carried by said crank-disk and movable thereby in a circular patina pivotal beatenarm, a'canrg roove on said beater-arm curved in the arc of a circle having the same radius as the radius of the circular path traversed by said crank-pin and arranged in one position of the beater-arm to axially register with said circular path, a cam-block slidably steel in said camgroove and having operating surfaces corresponding to and in surface engagement with the wallsofsaid groove said crank-pin being rotatably connected with said cam block, means for rotatably actuating said crank-disk whereby the beater-arm, through the medium of said crank-pin and cambloclc is pivotally oscillated, and a buffer in said cam-groove adapted to be engaged by said cam-block to start the pivotal oscillation of said beater-arm in one direction.

In testimony whereof I have hereunto set, 

